DOC: temporary remove pyarrow example of reading subset columns

Author: jorisvandenbossche

doc/source/io.rst

@@ -4548,16 +4548,15 @@ Read from a parquet file.
 
 .. ipython:: python
 
-   result = pd.read_parquet('example_pa.parquet', engine='pyarrow')
    result = pd.read_parquet('example_fp.parquet', engine='fastparquet')
+   result = pd.read_parquet('example_pa.parquet', engine='pyarrow')
 
    result.dtypes
 
 Read only certain columns of a parquet file.
 
 .. ipython:: python
 
-   result = pd.read_parquet('example_pa.parquet', engine='pyarrow', columns=['a', 'b'])
    result = pd.read_parquet('example_fp.parquet', engine='fastparquet', columns=['a', 'b'])
 
    result.dtypes